If X is true, Y must be ______, e.g. If John's bike needs repair

If X is true, Y must be ______, e.g. If John's bike needs repairing, John must have a bike.
A、true or false
B、true
C、false
D、true and false
【正确答案】：B
【题目解析】：If X is true, Y must be true, e.g. If John's bike needs repairing, John must have a bike.